Controller for combustion-chambers.



v W. R. MILLS. CONTROLLER FOR COMBUSTION CHAMBERS.

APPLICATION FILED 00m. 27, 1913.

1,090,869. Patented Mar. 24, 1914.

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W. R. MILLS.

CONTROLLER FOR COMBUSTION CHAMBERS.

APPLICATION FILED OCT. 27, 1913.

Patented Mar. 24, 1914.

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Specification of Letters Patent.

Patented Mar. 2%, inlet.

Application filed October 27, 1913. Serial No. 79l',401.

To all whom it may concern: I

Be it known that I, VVILLIAM RILEY ETILLS; a citizen of the United States of America, residing at Jackson, in the county of Jackson and State of Michigan, have invented certain new and useful Improvements in Controllers for Combustion- Chambers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to a controller for the combustion chambers of boiler furnaces whereby requisite amount of oxygen to meet the varying conditions of a fire may be supplied so as to insure complete combustion.

The device is so disposed that it may be attached to a furnace without any change in the details of construction of the latter and is also so designed that it does not yield to the heat of the combustion chamber.

The invention consists in the matters hereinafter set forth and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a view in perspective of a device that embodies the in-.

vention as shown in closed position; Fig. 2 is a view in transverse section through the device with the parts closed; Fig. 3 is a view in section of the device in open position; and Fig. 1 is a view, partially broken away and partially in elevation of the rear of the device when removed from the furnace.

Referring to the drawings a plate or grid 1 is arranged to span and be secured over an opening through the wall 2 of the combustion chamber of a furnace at a point to be determined by circumstances over the grate bars of the latter. An upper partition 3 extends outwardly from one cross bar 4 of the grid in spaced relation to an intermediate wall 5 and a lowerwall 6, the former of which has an upturned portion 7 and the latter an upright part 8. An outer casing 9 is secured against the grid to inclose the division walls of the latter and form with the wall 6 an outer passage that is in communication with the lower opening of the grid 1. A cover 10 rests on the upper part of the casing and grid and has an inner opening or slot that is controlled by a slide plate 11 and an outer opening with a register slide 12 to regulate the same. A rock shaft 13 that is journaled in the end walls of the casing 9 carries a damper having a wing 1 1 that when downturned as in Fig. 2 closes against the upper division wall 3. A divergent wing 15 of the damper is so disposed in relation to the wing 14 as to abut the up right part 7 of the division wall 5, when the wing 14 closes against the upper wall 3. An outer damper plate 16 is secured on a rock shaft 17 so as to span the interval between the upright part 7 of the wall 5 and the outer wall of the casing 9, a flange 18 on the latter forming a stop. When in upright position this damper forms a substan tially unbroken continuation of the outer wall portion 8, so that the first and second passages of the casing are at that time connected with the corresponding openings through the grid 1. A suitably disposed handle 19 extends from a lug 20 formed on the damper 16 with a latch 21 that may interlock with a quadrant 22 to hold the handle in required angular position. Rotation of the shafts 13 and 19 in the same direction by the manipulation of the handle is obtained through a gear train indicated at 23 or by other suitable operative connections which may be applied to either end of the shafts 13 and 17 as desired. The slide 11 is coupled by a link 2a with the lug 20. The link, operating handle, and dampers are so arranged that when the dampers close the passages between the walls as in Fig. 2, the slide 11 closes its opening and leaves a pas sage from the register 12 to the upper aper tures of the grid. When the parts are opened as in Fig. 3 the slide 11 cuts 05 the register to a greater or less extent accord ing to the inclination of the handle and the opening 10 is thereby in communication with the upper opening of the grid and with the passage between the walls 3 and 5.

As a further detail of good construction an inner shell 26 is secured against the face of the grid with depending hollow arms 27 having discharge outlets indicated at 28 whereby air is allowed to freely circulate from the register around the margins of the grid and protect the latter from the heated gases in the combustion chamber.

As a further detail of good practice the grid and casing may be mounted on hinges with a latch 29 and handle 30 for convenient manipulation.

In order that the inrushing currents of air through the controller may be deflected downward against the heated mass of fuel, or toward the latter at the point where they are most needed, a series of jet pipes 31 are disposed through the furnace wall 2 above the controller with a suitable supply pipe 32 and regulating valve, not shown, whereby jets of steam may be directed into the combustion chamber and thereby sweep the air currents downwardly as desired. The construction and disposition of the nozzles which do not form per se a part of this invention follow good boiler shop practice. As a result of this construction, a controller is obtained that is regulatable to admit any desired amount of oxygen to a combustion chamber at the point where it is most efficient in completing the ignition of the fuel and fuel gases.

The device is readily applicable to any furnace and is easily regulatable to meet different requirements of service as it is well shielded from the heat of the combustion chamber which does not burn or break it down.

Because of the disposition of the division walls that form the distributing passages, the air that is introduced is directed in a comparatively uniform manner to the point where it is desired, the walls preventing local deflections in the current and aiding it in maintaining its direction until it reaches the place where it is needed. The cooperative action of the dampers further aids in its distribution and regulation.

Obviously, changes in the details of construction may be made without departing from the spirit of my invention and I do not care to limit myself to any particular form or arrangement of Darts.

What I claim is 1. A controller for combustion chambers of furnaces, comp-rising a grid adapted to be secured over an opening through a fire wall of a combustion chamber, a shell in communication with the upper openings of the grid forming an air jacket around the in terior face of the grid, division walls extending outwardly and upwardly from between the other openings of the grid, a casing cooperating with the walls to form air distributing passages, a register in the upper part of the casing, a damper adapted when closed to throw the register into communication with the openings into the shell and when open to cooperate with the adjacent walls in forming passages in the upper part of the casing into the shell and through thegrid, a slide plate for cutting off the register and the adjacent casing opening alternately, a damper for controlling the remaining passage, and manually operable means connected to the dampers and to the slide plates for simultaneously operating them, the slide being arranged to close the opening when the companion damperis closed and to close the register when the companion damper is open.

2. A controller for combustion chambers of furnaces comprising a grid adapted to span an opening in the fire wall of a chamber and provided with a series of longitudinal openings, a shell around the inner face of the grid having discharge openings in its lower portion that communicate with upper grid openings covered by the shell whereby an air jacket is formed around the face of the grid, walls extending outwardly and upwardly from the grid between the other openings thereof, a casing cooperating with the walls to form air distributing passages through the regulator and having a register opening and a grid opening in the upper part thereof, a register for the register opening, a slide plate adapted to cut ofi' either the register opening or the adjacent casing opening,and a damper-adapted to throw the register and opening into communication either with the openings into the shell or with one of the openings into the shell and an air distributing passage, a damper regulating the other passages, a lever for operating the latter damper coupled to the slide, means for locking the lever in adjusted position, and means for coupling the other damper to the handle to turn in unison with the handle damper.

3. A controller for combustion chambers of furnaces comprising a grid adapted to span an opening in a fire wall of a combustion chamber and provided with division walls extending outwardly and upwardly therefrom, a shell forming an air jacket around a portion of the inner face of the grid, a casing cooperating with the walls and grid to form air distributing passages discharging into the shell and through the grid, a register opening through the top of the casing, a slide plate controlling another opening through the top of the casing, a damper adapted to throw the register and slide opening into communication with an adjacent passage and with openings into the shell, a damper controlling the other passages, gearing coupling the dampers to turn in unison, a link coupling the slide plate and one of the dampers whereby the slide cuts off the register when the adjacent damper opens the companion distributing passage, a lever for turning the dampers, and a quadrant for locking the lever in adjusted position.

In testimony whereof I afiix my signature in presence of two witnesses;

WILLIAM RILEY MILLS. lVitnesses:

ARTHUR JAMES WINENS, ROY DEDRICK.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

